It's actually very smart. Think about it, what's the odds of that happening the day after? It's probably lower than any other day after. Ppl are on high alert, that theatre and ain't gonna be dealing with no dumb sh*t.

why are people acting like this dude is a hero for watching this movie

Nobody is acting like he is a hero,and the interview and quotes might be a bit much,but let something like that happen to u,then you survive,I wonder if you would be brave enough to even approach the outside of a theater,let alone going in to one to watch the same movie not even a day later from fear of it happening again....and there will be fear,no doubt about that.All we saying is it takes courage to do what he did,that simple.